BC127 Mono Operation

[nir76]

Hello all,
Is it possible to configure the DAC (left or right analog out) to output a mono signal, in order to connect the module to a single speaker?
(mono signal = the sum of right and left channels)
My goal is try to avoid summing both outputs with resistors - If it can be done by software it would be much simpler.

Thanks
Nir

[mlw]

Nir,

I have been looking around and no I do not think you can set audio from the A2DP it to mono within the firmware. I think the HFP audio is already mono.

Regards

Matt

[nir76]

OK Matt, I will solve the matter externally to the module…

Thanks for your help.

By the way - there is another audio related issue which I’ve posted:

BC127 Analog Line in Hardware Configuration

Hello all, In my application, I wish to use the analog MIC Inputs as a “Line in” source (Route the analog input to analog output through the internal ADC>DAC) Microphone signal levels are much more lower than Line in signal level, due to this - is there a hardware application note for a “line in” configuration? (see the attached example - taken from an other BT module datasheet) [Line%20in%20example] Thanks, Nir

No reply till now…

Can you please help me with that?

Thanks again,
Nir

[mlw]

Nir,

Will try to have a look today.

Regards

Matt

[biller]

Hi Matt /Nir,

I have the same issue operating the module with a single speaker (a single channel only - left or right available only)
There is no way for me to solve this externally because the product is already series-production-ready.

Are you sure there is no way to mix down the A2DP stereo signal to mono? Like in TWS operation?
In the documentation it is described as follows:

This is why i was sure that the module could be combined with a single loudspeaker

Do you have any solutions, maybe by the new firmware?

Thanks

Marius